<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <script src="d3.js"></script>
  <script src="utils.js"></script>
</head>

<body>
  <div>
    <svg id="histo" width="600" height="300" style="background: lightgrey">
    </svg>
  </div>
</body>
</html>
